Which of the following membrane activities require energy from atp hydrolysis? a) facilitated diffusion of chloride ions across the membrane through a chloride channel b) movement of water into a cell c) na+ions moving out of a mammalian cell bathed in physiological saline d) movement of glucose molecules into a bacterial cell from a medium containing a higher concentration of glucose than inside the cell e) movement of carbon dioxide out of a paramecium

Tropical rain forests support more species per unit area than any other terrestrial ecosystem. what is one way rain forests are important to the health of the biosphere?

Suppose that on a small island off the coast of scotland, 32 percent of the population has blue eyes, which means that these individuals must be homozygous for the blue eye color gene (bb). the only other eye color found on the island is brown, and individuals that are homozygous for the brown eye color gene (bb) or heterozygous (bb) will have brown eyes because brown is the dominant gene. assume this population is in hardy-weinberg equilibrium. if 100 babies are born next year, how many of these would you expect to have brown eyes and be heterozygous? a. 58 b. 49 c. 29 d. 43

Approximately what wavelength of light is best absorbed by chlorophyll a